Question

While skiing in Jackson, Wyoming, your friend Ben (of mass 69.8 kg) started his descent down the bunny run, 16.8 m above the bottom of the run. If he started at rest and converted all of his gravitational potential energy into kinetic energy, what is Ben’s kinetic energy at the bottom of the bunny run? Use g = 9.8 m/s 2 Answer in units of J.

Answer 1

Answer: What is his final velocity?

Answer in units of m/s.

Explanation: i need help

Answer 2

11484.18 J

Step-by-step explanation:

Applying conservation of energy we get

potential energy = kinetic energy

mgh = 0.5mv^2

gh= 0.5v^2

`v= √(2gh)`

h= 16.8 m

g= 9.8 m/s^2

`v= √(2*16.8*9.8)`

v=18.14 m/s at the bottom of the bunny run

therefore, Kinetic energy at the bottom of the bunny run

K=
`(1)/(2) mv^2=(1)/(2)69.8*18.14^2`

therefore K= 11484.18 J

= 11.48 KJ